Metal-working tool



P. H. HAHNEMANN.

METAL WORKING TOOL. APPLICATION FILED Minn. 1918.

Patented Nov. 18, 1919.

INVENTOR. Rm! R flalmemaflfl BY t ATTORNEY.

UNITED s'rATEs PATENT onn on.

PAUL R. HAHNEMANN, OF SO'UTI'IINGTON, CONNECTICUT, ASSIGN OR TO THE PECK, STOW 80WILCOX COMPANY, OF SOUTI-IINGTON, CONNECTICUT, A CORPORATION OF CONNECTICUT.

To all whom it may concern Be it known that I, PAUL- R. HAHNEMANN, a citizen of the United States, and a resident of Southington, in the county of Hartford, State of Connecticut, have invented certain new and useful Improvements in Metal-VVorking Tools, of which the following is a specification.

The invention relates particularly to hand tools for use in the working of sheet metalfor instance tools adapted for the crimping, beading, flanging, etc., of sheet metal. The invention is illustrated as embodied in a cor rugating tool, such as tinsmiths use in properly shaping the end of a stove pipe, and the description of the invention will be directed to the embodiment here illustrated. I desire it to be understood however that the invention is not limited to the precise embodiment here shown. 7

The object of this invention is to provide a tool of the character described having features of novelty and advantage.

In the drawings Figure 1 is a view showing the method of holding the tool, the handle being shown in section.

Fig. 2 is the plan view of the tool,

Fig. 3 is a side view of the tool.

Fig. a is a central section showing the tool in position reverse from that of Fig. 3.

Fig. 5 is a detail view of a portion of the tool looking from the front of Fig. 2.

Referring to the drawings-a, denotes the hand grip of the tool having rearwardly extending arms 6 b, and a cross bar 0, which by preference is dropped a little below the plane of the arms 5, b. The hand grip is bored to receive the shaft 5, operated by the crank 6, and carrying at its opposite end one of the crimping rolls 7. Fig, 1 shows the manner of use of this tool and the support which is provided for the frame by having the cross bar 0, underlie the wrist, acting as a brace or steady rest to support the frame against the tendency to twist when the shaft is turned. This style of frame and holding means permit of using a crank handle for operating the crimping rolls which makes it possible to operate the tool at a very rapid rate.

The complementary crimping roll 10, is mounted on a short stud shaft 11, which is mounted on a carriage 12, pivoted in the METAL-WORKING TOOL.

Specification of Letters Patent. 7 Patented Ntnr, 18, 1919.

Application filed May 17, 1918.

Serial No. 235,065.

frame as at 13, at one side of the axis of the shaft 5, and having a. forwardly pro]ect1ng ear 14:, from which the adjustmg screw 15 operates to adjust the posi tion of the carriage and the spacing of the crimping rolls from one another. It will be seen that in the adjustment of the crimping roll 10, its axis always remains parallel with the main axis 5, thus insuring that the two rolls will be alined at all times while the metal to be operated on is fed through the rolls. 20 is a guide plate on the frame against which the edge of the metal being operated on may have a bearing.

In accordance with the provisions of the patent statutes I have described the principle of operation of my invention, together with the structure which I now consider to represent the best embodiment thereof; but I desire to have it understood that the structure here shown is only illustrative, and that the invention can be carried out by other means.

I claim as my invention:

1. In a tool of the character described, a hand grip, a brace connected therewith and adapted for engagement with the extremity of the operator holding the tool, a rotary shaft supported by said hand grip, means for rotating said shaft, cooperating metal fabricating members, one of which is mounted upon an axis parallel with the axis of said shaft and a driving connection between said shaft and members.

2. In a tool of the character described, a hand grip, a brace connected therewith and adapted for engagement with the extremity of the operator holding the tool, a straight rotary shaft supported by said hand grip, means on one end of the shaft for rotating the same, and a metal fabricating member on the other end of said shaft.

3. In a tool of the character described, a

4:. In a tool of the character described, a

rotary shaft, means for rotating the shaft, metal working rolls, a drivlng connection between said shaft and one of said rolls, a hand grip supporting said shaft and located between the means for rotating the shaft and the metal working rolls, and a brace connected to the hand grip and adapted for engagement with the extremity of the operator holding the tool.

5. In a tool of the character described, a frame comprising a hand grip, a cross bar at the rear of and supported by said hand grip and adapted for engagement with the extremity of the operator holding the tool, a rotary shaft supported by and extending lengthwise of said hand grip, a crank arm at one end of said shaft, metal working rolls, and a driving connection between said shaft and one of said rolls.

6. In a tool of the character described, a frame comprising a hand grip, arms extending rearwardly from said grip and a cross bar between said arms and below the plane thereof; a rotary shaft supported by and extending longitudinally of said hand grip; a crank arm at one end of said shaft; metal working rolls; and a driving connection be I tween said shaft and said metal working rolls.

7. In a tool of the character described, a rotary shaft, means on one end of the shaft for rotating the same, a metal fabricating member on the other end of said shaft, a hand grip supporting said shaft and located between said means for rotating the shaft and said fabricating member, and a brace connected to the hand grip and adapted for engagement with the extremity of the op erator holding the tool.

PAUL R. HAHNEMANN.

WVitnesses L. O. RIoH'rHoRN, CAROLINE IVAGNER. 

